# Recommendation G.961 (11/1988): Digital transmission system on metallic local lines for ISDN basic rate access

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051374](https://www.wikidata.org/wiki/Q27051374)  
**Source**: https://4ort.xyz/entity/recommendation-g-961-11-1988-digital-transmission-system-on-metallic-local-lines-for-isdn-basic-rate-access